PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-5423/9Boot,dust and Moisture Seal

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5930-00-904-5904 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-904-5904 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-904-5904. Primary manufacturer part number: MIL-DTL-5423/9.
Features
  • Boot,dust and Moisture Seal — FSC 5930
  • Material: RUBBER SILICONE BODY
  • Thread Class: 2B
  • Opening Inside Diameter: 0.250 INCHES NOMINAL IN
  • Mounting Method: INTEGRAL THREADED NUT
  • Nominal Thread Size: 0.500 INCHES IN
  • Width Across Flats: 0.625 INCHES NOMINAL IN
  • Base Thread Location: INTERNAL
Applications
  • Fluid containment and leak prevention
  • Pressure boundary maintenance
  • Environmental sealing
  • Applications requiring Rubber Silicone Body construction
General Description

The Boot,dust and Moisture Seal, cataloged under National Stock Number 5930-00-904-5904, is classified within Federal Supply Class 5930 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5930-00-904-5904
Primary Part NumberMIL-DTL-5423/9
Item NameBoot,dust and Moisture Seal
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
MaterialRUBBER SILICONE BODY
Thread Class2B
Opening Inside Diameter0.250 INCHES NOMINAL IN
Mounting MethodINTEGRAL THREADED NUT
Nominal Thread Size0.500 INCHES IN
Width Across Flats0.625 INCHES NOMINAL IN
Base Thread LocationINTERNAL
Test Data Document81349-MIL-B-5423 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Sealing MethodCOMPRESSION
Style DesignatorTHRU-HOLE
Thread Length0.175 INCHES NOMINAL IN
Hazardous Locations/environmental ProtectionDUSTPROOF-NEMA TYPE 13 AND WATERTIGHT-NEMA TYPE 4
Mounting Device Quantity1
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5930-00-140-3241 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-402-1021 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-491-8714 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-496-7492N9060X1/4 INTERCHANGEABLE
Boot,dust and Moisture Seal
Apm Hexseal Corp
5930-00-816-6119 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-823-0482 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-823-0573 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-892-9026N9040 1-8 INTERCHANGEABLE
Boot,dust and Moisture Seal
Apm Hexseal Corp
5930-00-982-9261 INTERCHANGEABLE
Boot,dust and Moisture Seal
5930-00-987-8829 INTERCHANGEABLE
Boot,dust and Moisture Seal
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-5423/9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILB5423-9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M5423/09-06 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5930-00-140-3241INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-402-1021INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-491-8714INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-496-7492INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
N9060X1/4
5930-00-816-6119INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-823-0482INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-823-0573INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-892-9026INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
N9040 1-8
5930-00-982-9261INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-00-987-8829INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-01-154-0858INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL
5930-01-412-6919INTERCHANGEABLE
BOOT,DUST AND MOISTURE SEAL

Frequently Asked Questions

What is NSN 5930-00-904-5904?

NSN 5930-00-904-5904 is a Boot,dust and Moisture Seal, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5930 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5930-00-904-5904?

NSN 5930-00-904-5904 has 3 cross-referenced part numbers: MIL-DTL-5423/9 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILB5423-9 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M5423/09-06 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5930-00-904-5904?

There are 12 known substitutes for 5930-00-904-5904: 5930-00-140-3241, 5930-00-402-1021, 5930-00-491-8714 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-5423/9?

Key specifications for MIL-DTL-5423/9: Material: RUBBER SILICONE BODY; Thread Class: 2B; Opening Inside Diameter: 0.250 INCHES NOMINAL IN; Mounting Method: INTEGRAL THREADED NUT. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5930-00-904-5904 still in active supply?

NSN 5930-00-904-5904 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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